Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6251
CALL
JELD-WEN Holding
JELD
$122M
| $37K | ﹤0.01% |
+3,000
| New | +$37.1K |
|
6252
CALL
St. Joe Company
JOE
$3.54B
| $37K | ﹤0.01% |
900
+800
| +800% | +$34.3K |
|
6253
PUT
Kite Realty
KRG
$5.81B
| $37K | ﹤0.01% |
1,800
+1,300
| +260% | +$27.4K |
|
6254
CALL
Loop Industries
LOOP
$35.3M
| $37K | ﹤0.01% |
+10,900
| New | +$27.2K |
|
6255
Direxion Daily MSCI Mexico Bull 3X ETF
MEXX
$19.7M
| $37K | ﹤0.01% |
+1,405
| New | +$34.5K |
|
6256
CALL
NBT Bancorp
NBTB
$2.74B
| $37K | ﹤0.01% |
1,100
-9,000
| -89% | -$353K |
|
|
HTT
6257
CALL
High Templar Tech Ltd
HTT
$379M
| $37K | ﹤0.01% |
31,300
-49,400
| -61% | -$58.2K |
|
6258
CALL
Radiant Logistics
RLGT
$386M
| $37K | ﹤0.01% |
5,700
-20,300
| -78% | -$113K |
|
6259
PUT
RE/MAX Holdings
RMAX
$193M
| $37K | ﹤0.01% |
2,000
+1,900
| +1,900% | +$37.8K |
|
|
SAGE
6260
PUT
DELISTED
Sage Therapeutics
SAGE
| $37K | ﹤0.01% |
900
+300
| +50% | +$12.9K |
|
6261
CALL
Saratoga Investment
SAR
$312M
| $37K | ﹤0.01% |
1,500
+1,400
| +1,400% | +$37K |
|
6262
Seadrill
SDRL
$2.8B
| $37K | ﹤0.01% |
+942
| New | +$36.9K |
|
6263
ThredUp
TDUP
$746M
| $37K | ﹤0.01% |
14,828
-13,889
| -48% | -$25.9K |
|
6264
CALL
Universal Corp
UVV
$1.31B
| $37K | ﹤0.01% |
700
-700
| -50% | -$36.7K |
|
6265
PUT
Viasat
VSAT
$10.6B
| $37K | ﹤0.01% |
1,100
-12,600
| -92% | -$430K |
|
|
EQC
6266
PUT
DELISTED
Equity Commonwealth
EQC
| $37K | ﹤0.01% |
1,800
-3,200
| -64% | -$74.2K |
|
|
EGIO
6267
PUT
DELISTED
Edgio, Inc. Common Stock
EGIO
| $37K | ﹤0.01% |
1,173
+988
| +534% | +$48.7K |
|
|
NSTG
6268
DELISTED
NanoString Technologies, Inc.
NSTG
| $37K | ﹤0.01% |
3,757
-139,045
| -97% | -$1.38M |
|
|
ABCM
6269
DELISTED
Abcam PLC
ABCM
| $37K | ﹤0.01% |
+2,794
| New | +$41.7K |
|
|
PTRA
6270
PUT
DELISTED
Proterra Inc. Common Stock
PTRA
| $37K | ﹤0.01% |
24,600
-1,700
| -6% | -$6.39K |
|
6271
PUT
AirSculpt Technologies
AIRS
$339M
| $36K | ﹤0.01% |
+7,200
| New | +$39.8K |
|
|
AMED
6272
PUT
DELISTED
Amedisys
AMED
| $36K | ﹤0.01% |
500
-7,400
| -94% | -$640K |
|
6273
Astronics
ATRO
$3.43B
| $36K | ﹤0.01% |
3,313
-2,244
| -40% | -$25.1K |
|
|
AVDX
6274
DELISTED
AvidXchange
AVDX
| $36K | ﹤0.01% |
+4,655
| New | +$44.8K |
|
6275
CALL
Atea Pharmaceuticals
AVIR
$376M
| $36K | ﹤0.01% |
11,000
-230,600
| -95% | -$935K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.